于国栋认为，在典型的双语社会中可能有一种语言是高变体（high variety）而另一种语言是低变体（low variety）。高变体就是根据社会行为规范应该选择的语言，而在私下交谈等场合就要使用低变体的语言。
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与常规育种相比，航天诱变育种具有诱变频率高、变异幅度大、育种周期短、有利突变体多等特点。
As compared with the conversational breeding, spaceflight mutation breeding is of high mutagenesis frequency, wide variation extent, short breeding period and more elite mutants, etc.
抗病突变体大多伴随着株高、熟期、育性或粒重等农艺性状的变异。
These mutants were almost accompanied by variations in agronomic traits such as dwarfism, high sterility, heading date or grain weight.
据该文所言，带有基因变体的人比不带有基因变体的人感染HIV的可能性高40%。
According to the paper, people with the gene variant were 40% more likely to become infected with HIV than people without it.
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